Paper Information

Journal:   JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC)   SPRING 2010 , Volume 4 , Number 13; Page(s) 93 To 98.
 
Paper: 

PREPARATION AND APPLICATION OF HARDENERS CONTAIN IMIDE LINKAGES IN CURING OF EPOXY RESIN

 
 
Author(s):  ZARDAN R.*, GANJI M.T., TAHVILDARI K.
 
* DEPARTMENT OF CHEMISTRY, ISLAMIC AZAD UNIVERSITY, NORTH TEHRAN BRANCH, TEHRAN, IRAN
 
Abstract: 

Highly use of epoxy polymers as coatings, adhesives, composites are due to their high chemical resistant, hardness, cohesion and coasting. The most common epoxy prepolymers ae forme the reaction between bisphenol A and epichlorohydrine most cured, with various hardeners. In this article efforts have been made to synthesize different diamines with imide linkages for curing epoxy to improve heat oxidation resistance property as a high performance polymer. Two novel diamine diimids have been synthesized through the reaction of 1,3-diamino benzene with pyromelitic dianhydride (PMDA) and 4,4'- (hexafluoroisopropylidene) diphthalicanhydride (6FDA), FT-IR and 1H-NMR spectroscopies confirmed the structure of these products. The curing temperature, time, physical properties, solubility, inherent viscosity were registered after curing. Heat properties of following epoxy resins were investigated by DSC and TGA. The results show that cured resin with hardener contain PMDA has more heat resistance and also curing time of resin will increase by this hardener.

 
Keyword(s): EPOXY POLYMERS, HIGH PERFORMANCE POLYMERS, THERMAL OXIDATION, DSC, TGA
 
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